良性或原发性震颤,或称Minor氏病,可见于儿童和成人。本病原因不明,预后一般良好。本病为孟德尔式显性遗传,但遗传表现程度不同。约有一半患者有阳性家族史,虽然原发性震颤可开始于任何年龄,但常出现在中年,并有随年龄增大而逐步加重的倾向。典型时首先见于上肢,并可能就局限于这些部位,但疾病后期可波及全身各部分。某些患者有语音震颤,头或颏抖动。严重时可使之失去 Benign or primary tremor, or so-called Minor’s disease, is seen in children and adults. The cause of the disease is unknown, the prognosis is generally good. The disease is Mendelian dominant inheritance, but the degree of genetic expression is different. About half of patients have a positive family history. Although essential tremor may start at any age, it is often seen in middle age and tends to increase with age. First seen in the typical upper extremity, and may be limited to these parts, but the disease can spread to all parts of the body late. Some patients have speech tremor, head or neck shaking. Serious can make it lose